print('AAAAAAAAAAAAAAAAAA')
print('AAAAAAAAAAAAAAAAAA')
print('AAAAAAAAAAAAAAAAAA')
print('AAAAAAAAAAAAAAAAAA')

# 变量
A = 'AAAAAAAAAAAAAAAAAA'
print(A)
print(A)
print(A)
print(A)


# 函数
def add(num1, num2):
    return num1 + num2


def sub(num1, num2):
    return num1 - num2


def info(msg):
    print(msg)


# 类
class Operation:
    def __init__(self, num1, num2):
        self.num1 = num1
        self.num2 = num2

    def add(self):
        return self.num1 + self.num2

    def sub(self):
        return self.num1 - self.num2


class Info:
    def info(self, msg):
        print(msg)

